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This is a Quantitative Study study.

October 2, 2025Open Access

SIM-Enabled Hybrid Digital-Wave Beamforming for Fronthaul-Constrained Cell-Free Massive MIMO Systems

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The hybrid beamforming framework enhances coverage while reducing costs by integrating digital processing with wave-domain beamforming.
A joint optimization problem maximizes the weighted sum-rate for uplink and downlink transmissions under finite-capacity fronthaul constraints.
Numerical results indicate that the proposed scheme nearly achieves fully-digital performance with fewer RF chains in most scenarios.
Alternating optimization algorithms effectively address the high dimensionality and non-convexity challenges in the hybrid beamforming process.

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Implication

Hybrid beamforming significantly improves performance and reduces RF chain needs in cell-free massive MIMO, suggesting potential cost-effective solutions.

Cite This Study

Park et al. (2025) studied this question.

synapsesocial.com/papers/68de84bf5b556a9128e1bc00 https://doi.org/10.48550/arxiv.2506.19090

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Implication

Hybrid beamforming significantly improves performance and reduces RF chain needs in cell-free massive MIMO, suggesting potential cost-effective solutions.

SIM-Enabled Hybrid Digital-Wave Beamforming for Fronthaul-Constrained Cell-Free Massive MIMO Systems

Key Points

Discussion

Implication

Cite This Study

SIM-Enabled Hybrid Digital-Wave Beamforming for Fronthaul-Constrained Cell-Free Massive MIMO Systems

Key Points

Discussion

Implication

Cite This Study

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